linux-kernel - Re: 2.6.23-rc8-mm2: problems on HP nx6325

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Message-Id: <200709271759.46018.rjw@sisk.pl>
Date:	Thu, 27 Sep 2007 17:59:45 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: 2.6.23-rc8-mm2: problems on HP nx6325

On Thursday, 27 September 2007 17:19, Rafael J. Wysocki wrote:
> On Thursday, 27 September 2007 11:22, Andrew Morton wrote:
> > 
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc8/2.6.23-rc8-mm2/
> > 
> > 
> > - The scheduler devel tree has been restored
> > 
> > - The driver tree is presently busted, so I reverted it to the 2..23-rc8-mm1
> >   version.
> > 
> > - It's now a nearly-32MB diff.
> 
> On HP nx6325:
> 
> 1) The audio is back (thanks for reverting x86_64-mm-cpa-einval.patch)
> 
> 2) CPU hotplug is busted (onlining of CPU1 kills the kernel), probably due to
>    the same issue that I'm having with the -hrt version of 2.6.23-rc8 (we're
>    debugging it right now)

This one is fixed by the following patch:

---
From: Rafael J. Wysocki <rjw@...k.pl>

Fix CPU hotplug breakage on HP nx6325 and similar boxes caused by a reference
to disable_apic_timer (labeled as __initdata) from the CPU initialization code.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 arch/x86_64/kernel/apic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.23-rc8-mm2/arch/x86_64/kernel/apic.c
===================================================================
--- linux-2.6.23-rc8-mm2.orig/arch/x86_64/kernel/apic.c
+++ linux-2.6.23-rc8-mm2/arch/x86_64/kernel/apic.c
@@ -42,7 +42,7 @@

 int apic_verbosity;
 static int apic_calibrate_pmtmr __initdata;
-int disable_apic_timer __initdata;
+int disable_apic_timer __cpuinitdata;

 /* Local APIC timer works in C2? */
 int local_apic_timer_c2_ok;
-
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